Does the programme rely on a narrative structure, with a hero, mystery and suspense?
What use is made of charts and diagrams?
What part is played by sound effects, visual content, mood-and-atmosphere shots, and any accompanying music?
Is the viewer's attention engaged and sustained by appeals to logic or emotion?
What is "info-tainment"?
A text may help: search for "transcripts" at www.bbc.co.uk and www.cheops.org